Otter Creek Arms Ocl-201 M4 Collar Black Nitride
The Otter Creek Arms OCL-201 M4 Collar is a precision suppressor locating collar built for shooters who run serious sound reduction hardware on their rifles. If you're mounting an Ops Inc 12 Model, AEM5, or OCM5 suppressor to an M4 spec barrel, this collar is the hard-use interface that keeps everything aligned and secure shot after shot. It's the kind of component that doesn't get attention until you need it—and then you're glad it's there.
Built from H900 heat-treated 17-4 stainless steel, the OCL-201 is engineered for the durability that serious suppressors demand. The black nitride finish protects against corrosion and abuse while delivering the professional look you'd expect from Otter Creek Arms' no-nonsense engineering. This is suppressor hardware designed for precision rifles, tactical builds, and hunters who want rock-solid suppressor mounting without compromise.
Whether you're running precision rifle work at the range, hunting, or working a duty gun, a quality locating collar ensures your suppressor stays true to the barrel centerline. That consistency translates directly to performance and reliability. Otter Creek Arms built this collar to handle the real demands of suppressed rifles, not just look the part.
Key Features
- H900 heat-treated 17-4 stainless steel construction for durability and longevity
- Black nitride finish resists corrosion and wear
- Designed for Ops Inc 12 Model, AEM5, and OCM5 suppressors
- Precision M4 spec barrel compatibility
- Reliable suppressor alignment and mounting security
Specifications
| Material | 17-4 Stainless Steel (H900 Heat Treated) |
| Finish | Black Nitride |
| Barrel Compatibility | M4 Spec Barrels |
| Suppressor Compatibility | Ops Inc 12 Model, AEM5, OCM5 |
Frequently Asked Questions
Which suppressors will this M4 collar work with?
The OCL-201 is designed to work with Ops Inc 12 Model, AEM5, and OCM5 suppressors on M4 spec barrels. If you're running a different suppressor model, verify compatibility before purchase.
What's the purpose of a suppressor locating collar?
A locating collar ensures your suppressor stays centered on the barrel during firing, maintaining precise alignment and consistency. This improves sound reduction performance and helps ensure reliability through extended shooting sessions.
Is this collar built for harsh conditions?
Yes. The H900 heat-treated 17-4 stainless steel and black nitride finish are engineered for durability in demanding environments, whether you're running this on a precision rifle, a tactical build, or a hunting gun.

